A 506b structure will require you to have an established relationship with the sponsor. 

I did put in all my channel descriptions "Host requires identity confirmation before check in".thanks, Paul (from VA Beach)

You should definitely ask what he/she meant and if it's a suggestion or requirement based on the amount of properties.

Doesn't that require BOTH signatures to sell? 

Currently, I'm in the process of setting up my entity (C-Corp/GP/LP/LLC), and I have a few questions:1) What is the required down payment, and which documents are necessary for the financing process?

The budget required would be more like 350-400k ideally.

Yes, that would require commercial lending. 

If no historic use permit exists, a use change variance will be required.

.$500,000 Exclusion for Married CouplesThere are certain additional requirements you must meet to qualify for the $500,000 exclusion.

(c) If the landlord stores the personal property on the premises, the cost of storage shall be the fair rental value of the space reasonably required for that storage for the term of the storage."